METHOD FOR REINFORCEMENT OF PILE FOUNDATION Russian patent published in 2020 - IPC E02D27/08 

FIELD: construction.

SUBSTANCE: invention relates to construction and can be used for reinforcement of pile foundations of buildings and structures erected in any non-rocky soils to prevent development of additional deformations of soil base with increasing loads on foundations or deterioration of physical and mechanical characteristics of soils. Method of reinforcing pile foundation on weak dispersed soils includes step-by-step injection of hardening solution under pressure into zone of soil mass under piles through injectors, submersed at depth exceeding the depth of piles immersion, wherein injectors are introduced into soil within grillage through formed through holes in foundation. Injection of hardening solution is performed on entire depth of compressible soil thickness from below upwards through several injection horizons, number of which, their height position and volume of pumped hardening solution are assigned depending on engineering-geological conditions of site, geometrical parameters of pile foundation and values acting on compressible soil thickness of loads. Through holes in the foundation are made in the body of the piles at their centre and in the grillage frame above them throughout the height of the foundation. Injection of hardening solution is performed in two stages by outline piles and by internal piles.

EFFECT: technical result consists in providing the possibility of reinforcing pile foundations by preventing occurrence and development of dangerous deformations of the soil base on the entire depth of the compressible soil stratum, high efficiency of the reinforcement method.

1 cl, 1 dwg